Resilient tire for vehicle-wheels.



H. L. HARDNG.

BESILIENT TIRE FOR VEHICLE WHEELS. APPLICATION FILED APR.10.1913.

Patented Feb. 18, 1919.

i `To all 'whomiz't may concern:

useful lm rovement Relating HENRY LEONARD HARDING, F LOUGHTON, ENGL.

BESILIENT TIRE ron vEHIcLn- 1 l Lacasse.

Be it known that I, HnNRr LEONARD l-l'ARDING, 'a subject of the King of Great Britain, residing at Loughtom in the county of Essex, England,`have invented a new and tofResilient Tires for chicle-Wheels, of whichthe following is a specification.

This inventlon relates to yelastic or resili# ent tires for vehicle wheels andconsists essentially in providing animproved-bearing surface or tread forvsuch tires the chiefob-y jects being to insure great adhesion betweenA the parts constituting the tireto prevent oXidation or rusting and to obtain a practically homogeneous mass whereby the structure is rendered strong and durable andV not liable to deterioration or dislocation."

The invention comprisesa ring or band of metal such as good flexible steel which constitutes the tread of the tire and'which is formed or providedon the inner face with longitudinal or circumferential grooves of dovetail formation. Holes or perforations are made in the grooves at suitable 'intervals the holes penetrating to the outer face of the ring or band. The holes or'perforations are countersunk and of tapered.'

form. The inner surface of the vring or band is also roughened preferably by tearing the metal while machining the said surface the latter thereby presenting the appearance of a le. The surfaces of the ring or band are served or plated with an alloy of copper, zinc and antimony for the purpose .of preserving the same from ox-` dation or rusting. The grooves in the ring or band are furnished with bands or strips of rubber and the said ring or band so preparedis forced into position on the periphery 'of the tire in any suitable manner and the holes or perforations lled with-rubber plugs. The structure is then subjected to vnlcanization in a Amold the pressure on the latter being gradually increased'while cool# ing after vulcanization.

ln orderv that the invention may be readily understood and carriedinto effect same will now be more fully described with 'refer-4 ence to the accompanying drawing in which is represented in transverse section a portion ,of a solid rubber or resilient tire having the present'improvements applied thereto.

'The ring or band 1 which may be of ilexible steel is formed as regards the inner surface with dovetail shape grooves 2 which ex- Specicationpof Letters Patent. Patentgd Feb, lg, 119333190 application mea .april 1o, 191s. vserialnaaazcee. y

tend wholly around the circumference the v grooves penetrating a suitable distance into the metal of the ring Vor band. At suitable distances along the `grooves 2 holes or perforations 3Z are' ,formed which pierce the metal' fromthe bottom or door of the grooves tothe outer surface of the'iing or 'band 1 and are of taper formation as shown. vTlie grooves 2 and holes 3 are adaptedto receive respectively strips or Vbands of rubber 4 and rubber plugsv or lkeys 5. The inner surface of the ring or band is machined and subjected to a tearing action' so as to produce ia roughenedV surface 6 similar in appearancel to that of an ordinary le the object 'being to obtain increased adhesion for the parts in contact therewith. A

The ring or band l before having'the rubber strips or bands 4 or the plugs or keys 5 applied thereto is treated for the purpose ofA furnished as regards the grooves 2 with the strips or bands 4 of rubber and the ring l forced upon the periphery of the tire 7 the said periphery having been previously prepared for the reception of the metal ring or band 1 and a layer of strong cloth applied thereto. The method of application of the canvas or cloth tothe surface of the-rubber method employed may be that which is best suited to prevailing circumstances or requirements. -Having applied the i" band 1 to the periphery of the rubber` tire 7 the holes or perforations are now filled with rubber plugs or keys 5 and the structure subjected to v'ulcamzation in a mold. .in order to render the structure a practicallyr homogeneous whole when finished pressure en the mold is applied with adually increasing eifect while cooling a er the proc'- ess ofl vulcanization has been eected.

In the abovedescri tion it has beenas-v sumed that the tire 7 1s of solid formation will be' readily understood by those acvquainted with the art and the particular and applied to the wheel telly in any desired manner. A preferred method of apm 4 plication is by means of a metal band 9 and an intermedlate ring 10 or goed tough ebonite the metal band being formed withl circumterential'grooves 11 and perforations "'12 and fitting upon the .beveled surface of ebonitesolution von the side which is to re-' ceive therubber 7 the naphtha in the solution being allowed to evaporate.v 'lhe innerV portions of the tire is built up with thev ebonite ring 10 to a depth correspondingl with the louter edge of the anged portion 1d of the band 9 and coatedwith a good tough rubber solution. The naphtha having been allowed toA evaporate trom the solution f the'tire 7 is up to the thickness required to fit tightly and snuly in the band l 'when vulcanized' and t y oroughly set. Before applying the band .1 it is thoroughlyl cleaned and the surfaces thereof which are to be vulcanized to the rubber coated with ebonite solution from which dii the naphtha is allowed to evaporate. The tire 7 A'is vulcanized on the band 9 fin a suitable mold, the vulcanization being sucient to vulcanize the rubber only, and

` allowed to set thoroughly. 'lhe -periphery of the tire'7 having been cleaned and coated with rubber solution and the naphtha allowed to evaporate from the latter the canvas orV cloth fabric 8 impregnated and coated with rubber solution is applied.A 4rlhe band 1 having the strips or bands d applied thereto is then forced on the tire? and the plugs or lreys 5 inserted and forced into the holes 3. A temporary wrapping of strong cloth is then applied to the periphery and the whole is placed in a suitable inoldk and I' 'i nally vulcanized the pressure on the mold v, being gradually increased during 'the cooling after vulcanization. By these means a "very strong anddurable structure lis obtained the tire 7 with the canvas orl cloth 8 has Y geneous mass.

` the strips or bands e plugs orllreys 5 and ebonite 10 being firmly united' to the rings or bands 1 and-9 Vand c" nstituting a homo- 'lhe metal band plated with the 'above described non-oxidizable alloy. ltV is advantageous to .coat or to come'into contact with either rubber or ebonit'e with the `aforesaid or similar alloyl When using the invention-lin' connection with. the outer` cover. oil a pneumatic tirel the modus-operandi in arnioringE the tread essere@ thereolE issubstantially similar to that already fully described with reference to the solid tire and further description is therecore unnecessary. i

l claim 1. ln an elastic or resilient tire for vehic Acle wheels the combination with a rubber" .cushion of an outer metal ring formed with cushionof an outer metal ring formed with x circumferential dovetail shaped grooves inV its inner surface. and tapered perforations at suitable distances in said grooves extending from the base'of the latter to the outer sur-y 'face of the said ring, roughened portionson the said inner surface of the said ring adapted to present a surface similar to that of an ordinary le and rubbervrings filling said,

grooves and rubber plugs filling saidperfof rations.

3L in an elastic or resilient tire for vehicle Wheels the combination with a rubber.

cushionof an outerinetal ring formed with its 4inner surface and perforations at suit- -circiunferentialv dovetail shaped grooves in able .distances in said grooves extending from the base of the latter to the outer surface of the said ring rubber rings lling said grooves "and rubber plugs lling said perforations and a layer of canvas impregnated' and the outer metal ring.

Il. ln an elastic or resilient tire for vehiand coated with rubber solution between the adjacent surfaces of the said rubber cushiony cle wheels the combination with arubber- ,y

face ofthe said ring roughened-portions on the 4said inner surface of the said ring adapt ed to lpresent a surface similar to that-of an 'ordinary file rubber. rings lling said j grooves and' rubber plugs lling` said. perforations 'andi a layer of canvas impregnated and coated with rubber solution between the adjacent surfaces of the said rubber cushion f and the outer metal ring.

metal ring 'formed with circumferential v f elaslichor resglnt tige for vehicle v wee Jnw1c'a`ru-rcus 'o t.l` plate all metal surfaces which are designed f l n an ou er dove tail shaped grooves'inits inner surface and perforations at suitable distancesthey latter to the outer surface ofthe said inf said grooves extending from' the base'of mear/ee layer of canvas impregnated and coated with rubber solution between the said rubber cushion and outer metal ring are constituted a homogeneous mass by vulcanizing the same in a mold. 4

f. An elastic or resilient tire for vehicle Wheels in .which a rubber cushion an outer metal ring itornied with circumferential dove tail shaped grooves in its inner surface and tapered perforations at suitable distances in said grooves extending from the base of the latter t0 the outer surface of the saidring roughened portions .on the said innery surface of said ring rubber rings in said grooves and rubber plugs in said perforations and a layer of canvas impregnated and coated with rubber solution between said cushion and outer metal ring are rendered a homogeneous mass by subjecting the same to vulcani- Zation in a niold upon which a graduallyincreasing pressure is exerted during the cooling after vulcanization.

7. An elastic or resilient tire for vehicle Wheels in which an outer ring having inner circumferential dovetail shaped grooves and perforations respectively filled With rubber rings and plugs a rubber cushion and an inner metal ring also having circumferential dovetail shaped grooves and perforations and a ring of ebonite intermediate the said inner metal ring and the rubber cushion ,are rendered a homogeneous mass by the method of vulcanization in which a gradually increased pressure is exerted upon the mold While the structure is cooling subsequent to the nal vulcanization.

8. An elastic or resilient tire for vehicle Wheels in Which 'a rubber cushion an outer metal ring 'formed With circumferential dovetail shaped grooves in its inner surfacer tapered perjorations at suitable distances in said grooves extending from the base of the latter to the outer surface of the said ring and roughened portions on the said inner surface of said ring rubber strips neuer suonano naunine. 

